@article{MASLO_1975_25_1_a3,
     author = {Sekanina, Milan},
     title = {Graphs and {Betweeness}},
     journal = {Mathematica slovaca},
     pages = {41--47},
     year = {1975},
     volume = {25},
     number = {1},
     mrnumber = {0422094},
     zbl = {0299.05114},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MASLO_1975_25_1_a3/}
}